CVEs / CVE-2021-38406

CVE-2021-38406: Delta Electronics DOPSoft 2 Improper Input Validation Vulnerability

Known exploited in the CISA KEV catalog since 25 Aug 2022
high 7.8 CVSS 3.1 (NVD)
EPSS 76.4% chance of exploitation in the next 30 days, higher than 99% of CVEs (30 Oct 2026)
Last changed at its sources 17 Jun 2026

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Summary

Delta Electronics DOPSoft 2 lacks proper validation of user-supplied data when parsing specific project files (improper input validation) resulting in an out-of-bounds write that allows for code execution.
CISA, Known Exploited Vulnerabilities catalog

Description

Delta Electronic DOPSoft 2 (Version 2.00.07 and prior) lacks proper validation of user-supplied data when parsing specific project files. This could result in multiple out-of-bounds write instances. An attacker could leverage this vulnerability to execute code in the context of the current process.
The CVE record, via NVD · published 17 Sep 2021 · NVD status: Analyzed

Affected and fixed versions

As stated by the CVE record (from the CNA)
Product	Affected	Fixed in
Delta Electronics DOPSoft 2	from unspecified, up to and including 2.00.07	—

Exploitation

In CISA KEV since	25 Aug 2022
Due date for US federal agencies	15 Sep 2022
Used in ransomware campaigns	Unknown
Required action	The impacted product is end-of-life and should be disconnected if still in use.

Severity

CVSS 3.1	7.8 high `CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H` Scored by NVD
Weakness	CWE-787

References

CVE-2021-38406 on NVD
CVE-2021-38406 in the CISA KEV catalog
https://www.cisa.gov/uscert/ics/advisories/icsa-21-252-02 (cited by CISA)
https://us-cert.cisa.gov/ics/advisories/icsa-21-252-02 Third Party Advisory, US Government Resource
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-38406 US Government Resource

Sources

Exploitation status from the CISA Known Exploited Vulnerabilities catalog. EPSS scores from FIRST. Descriptions, severity and references from the National Vulnerability Database. Open-source package versions from OSV (CC-BY 4.0). Text is shown as each source states it; Stackurity does not edit it. Check the vendor's advisory before acting.

This product uses data from the NVD API but is not endorsed or certified by the NVD.